After the beginning of
Operation Barbarossa, Smirnov continued to lead the school. In October, he was appointed commander of the
380th Rifle Division, forming at
Slavgorod in the
Siberian Military District. After the completion of its formation, the 380th was sent to the
Karelian Front in the
Vytegra area. Relocated to the
Kalinin Front in the
Nelidovo area during January, the division joined the
22nd Army, fighting with the latter in the
Sychyovka–Vyazma Offensive from 21 February 1942. Smirnov was wounded on 13 March during fighting near the village of Trukhanovo,
Kalinin Oblast, and after treatment became commander of the 1206th Rifle Regiment of the
362nd Rifle Division. After becoming deputy commander of the
186th Rifle Division of the 22nd Army in April, Smirnov participated in the occupation of a defensive line on the north bank of the
Molodoy Tud along the line of Peredovo, Molodoy Tud, and Medvedevo. Returning to command of the 380th in September, Smirnov was transferred with it to the front's
39th Army. In late September, the division advanced to the
Volga River and captured a bridgehead on the northern bank of the river, ten to twelve kilometers northwest of
Rzhev. Until the end of December, it held defensive positions in the bridgehead, being transferred to the
30th Army of the front on 29 November. After the 380th departed for the
1st Shock Army of the
Northwestern Front, fighting southwest of
Demyansk on 31 December, Smirnov transferred to command the
6th Guards Airborne Division in March 1943, which he led for the rest of the war. He led the 6th Guards Airborne in the failed
Staraya Russa Offensive, after which it was withdrawn to the
Reserve of the Supreme High Command (RVGK) in April. With the
5th Guards Army, it fought in the
Battle of Prokhorovka during the
Battle of Kursk in early July, then in the
Belgorod-Kharkov Offensive. For his "constant and skillful leadership" of the division in the initial stages of the latter, Smirnov received the
Order of the Red Banner on 5 September. From early September Smirnov led it in the
Battle of the Dnieper. He was promoted to
major general on 16 October. During the remainder of the war, Smirnov led the division in the
Kirovograd Offensive, the
Korsun–Shevchenkovsky Offensive, the
Uman–Botoșani Offensive, the
Second Jassy–Kishinev Offensive, the
Budapest Offensive, the
Bratislava–Brno Offensive, and the
Prague Offensive. For his "exemplary fulfillment of command orders" and "courage" in the Second Jassy–Kishinev Offensive of late August 1944, Smirnov was awarded the
Order of Suvorov, 2nd class, on 13 September of that year. == Postwar ==